JP2002338165A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive buffer of high reliability for an elevator by recording the history of the operation of the buffer. SOLUTION: This elevator device is provided with a structural body for sensing the pressure generated on the buffer when the buffer is operated, and recording the same, on an upper, side or lower face of the buffer, or a side part of the buffer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator, which is installed at the bottom of a hoistway of an elevator, and when a car or a counterweight descends past a proper stop position of the lowermost floor, the collision force with an appropriate deceleration is generated. The present invention relates to a shock absorber for an elevator used for relaxing and safely stopping.

[0002]

2. Description of the Related Art An elevator cannot be operated in a normal state.
The car may descend past the normal stop on the bottom floor. Therefore, even in the event of such an abnormality, in order to reduce the collision force of the car so that the car can safely stop,
As shown in the figure, the installation of the shock absorber 1 is obligatory at the bottom of the hoistway 51 of the elevator. As is well-known, the shock absorber 1 is configured such that a car or a counterweight of an elevator descends past a regular stop position on the lowest floor, and the speed at this time is the rated speed of the elevator,
Alternatively, the rated speed of 1.1 specified by regulations
Even at 5 times the speed, so-called high speed collision speed,
It is required to be installed on the premise that the car has a performance capable of stopping the car safely. In FIG. 8, a wire rope 54 suspended from a car 55 is suspended by a car 55 on a sheave 57 of a hoisting machine 53 installed in a machine room (not shown).
By rotating the sheave 57 from 8 through a speed reducer 59, the car 55 is operated. The shock absorber 1 is also installed below the counterweight 56.

By the way, the type of the shock absorber 1 is as follows.
Conventionally, a spring type shock absorber and an oil-filled shock absorber have been known.

[0004] An example of this is an oil-filled shock absorber disclosed in Japanese Utility Model Publication No. 49-20678.

[0005]

The situation in which the shock absorber is used is a case where the failure of the brake and the failure of the safety gear overlap, and the frequency of actual use is extremely low. Therefore, it is not realistic to design the shock absorber to operate indefinitely.

Therefore, it is practical to set a finite number of operations that is more suitable for actual use.

As a result, a design with a higher degree of freedom such as space saving can be realized.

However, in order to ensure the function, it is necessary to confirm that the condition of the shock absorber is always in the best condition.

[0009] Setting the number of operations in accordance with the actual use status means that the performance cannot be ensured after the specified number of uses.

Therefore, it is essential to keep a history of the number of times the buffer has been used.

[0011] Then, before the number of times of use assumed as designed is exceeded, measures such as maintenance and replacement of the shock absorber may be taken.

An object of the present invention is to provide a cheaper and more reliable elevator shock absorber by retaining the operation history of the shock absorber.

[0013]

[Means for Solving the Problems] As a method of leaving a history, it is possible to measure the acceleration, speed, etc. in the car and electrically record the operation of the shock absorber, but the device becomes complicated and accidental or intentional It is undeniable that there is a possibility of erasing the electrical record due to. A mechanical recording method with a simpler structure is effective.

In order to achieve the above object, the present invention senses and records the pressure generated in the shock absorber when the shock absorber is operated on the upper surface, the side surface, or the lower surface, or on the side of the shock absorber. A structure is provided.

[0015] With this structure, the absolute number of times the shock absorber is used can be grasped, and the intended purpose can be achieved.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Explanation will be made based on 1.

When the car cannot be braked due to a failure of the braking device or the like, before the collision with the hoistway floor 105, the shock absorber 1
It absorbs shock.

The shock absorber 1 is installed directly on the elevator car floor 105 directly below the car 101 or the counterweight 102 or indirectly via a bracket or the like.

Further, each one corresponds to an applied load and an impact.
Set up several pieces.

The specifications of the shock absorber 1 are determined by the energy at the time when the car 101 and the load (passenger etc.) in the car or the counterweight 102 collide with the floor 105 of the elevator hoistway. The mass of the object, the spring constant of the shock absorber, and the stroke of the shock absorber are parameters.

As described above, the failure of the elevator leading to the use of the shock absorber 1 is almost negligible. This is obviously over-spec, and there are restrictions and disadvantages such as an increase in the size of the shock absorber.

By setting the design life of the number of times of operation of the shock absorber 1 to several to several tens of times, the degree of freedom of design is increased, and a more inexpensive and smaller shock absorber can be designed.

As a method for achieving these objects, there is a method in which a pressure-sensitive sheet 2 is attached.

A sheet that changes color or develops color by detecting pressure and that does not return to its original state once the color has changed is applied directly to the upper surface of the shock absorber 1 on which a pressure is applied on the car, or a shock absorber that generates distortion due to the deflection of a spring. Paste on the side or back of 1.

When the car 101 or the counterweight 102 collides with the shock absorber 1, pressure is applied to change the color of the pressure-sensitive sheet, and it can be recognized that the shock absorber 1 has been used.

The sheet 2 preferably changes its color sequentially according to the number of impacts. However, if it is difficult to obtain the sheet 2, the sheet 2 may change its color only once.

The history may be left once or arbitrarily. However, since the frequency of use of the buffer 1 is extremely low, it is usually sufficient to detect the history only once.

In some cases, only the static weight of the shock absorber 1 is temporarily applied to the shock absorber 1 during construction or maintenance. However, if the shock at this time is within an appropriate range, the life of the shock absorber 1 is not affected.

Therefore, when only the own weight is applied, the history is not left, and the history is left only when the car 101 collides with the shock absorber 1.

FIG. 8 shows a flow of the periodic maintenance and inspection of the shock absorber.

At the time of periodic maintenance and inspection, the history is checked, and work to increase safety such as replacement of the shock absorber 1 is performed before the operation history exceeds the management value.

When the history is to be left only once, the sheet 2
When the discoloration is recognized, in this case, it is necessary to replace immediately or, if there is a remaining life, the same sheet 2 may be pasted again. At that time, leave the discolored old sheet 2 as it is,
History can be recorded.

In this case, the design life is not one but the number of times with a margin given the maintenance interval.

In the above description, the pressure-sensitive sheet 2 is adhered to the side surface of the shock absorber 1 and the like.

The position where the rod 3 stands is when the rod 3 is in the basket 101.
Alternatively, a position other than the counterweight 102 is not affected by the displacement. For example, in the case of a shock absorber using an elastic body, FIG.
As shown in FIG. 6, when the cross-sectional area increases when the shock absorber 1 is compressed, the interval is set so that the side surface thereof does not touch the rod 3. The length of the rod 3 is a length excluding the deflection L or more when only the own weight is applied from the height of the shock absorber.

Further, the rod is easily deformed or buckled when the car collides, and does not affect the deformation of the spring.

When the car 101 collides with the shock absorber 1, the rod
3 is permanently deformed, thereby leaving a history of use of the shock absorber 1 (FIG. 6).

In the above embodiment, when the car 101 collides, the rod 3 is permanently deformed. However, as shown in FIGS.
3 is elastically deformed and returns to its original state when the mass acting on the shock absorber 1 is lost. In this case, the rod may be a spring 4.
In this case, the rod 3 or 4 is designed to be broken a predetermined number of times.

Thus, a plurality of histories can be easily left.

It is obvious that the same applies to the shock absorber 1 even if it is a metal coil spring, a resin spring, an oil-filled shock absorber, a metal leaf spring, or the like.

It is obvious that the present invention can be applied to all elevators using a shock absorber, such as a hydraulic type, a skew type, and a type in which a hoist is provided on a hoistway floor, regardless of the type of elevator.

Incidentally, the material used in the above embodiment is
It is a resin material.

[0043]

According to the present invention, a cheaper and more reliable elevator shock absorber can be obtained by easily leaving the operation history of the shock absorber.

[Brief description of the drawings]

1A is a plan view showing an embodiment of the vicinity of a cushioning material of an elevator apparatus according to the present invention, and FIG. 1B is a side view.

FIG. 2 is a plan view showing another embodiment in the vicinity of a cushioning material of the elevator apparatus according to the present invention.

FIG. 3 is a plan view showing another embodiment in the vicinity of a cushioning material of the elevator apparatus according to the present invention.

FIG. 4 is a plan view showing another embodiment of the vicinity of the cushioning material of the elevator apparatus according to the present invention.

FIG. 5 is a plan view showing another embodiment of the vicinity of the cushioning material of the elevator apparatus according to the present invention.

FIG. 6 is a plan view showing another embodiment of the vicinity of the cushioning material of the elevator apparatus according to the present invention.

FIG. 7 is a plan view showing another embodiment of the vicinity of the cushioning material of the elevator apparatus according to the present invention.

FIG. 8 is a diagram showing an embodiment of a maintenance and inspection system for a cushioning material of an elevator apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Shock absorber, 2, 2a, 2b ... Pressure sensitive sheet, 3 ... Pressure sensitive rod, 4 ... Pressure sensitive spring, 101 ... Car basket, 102 ... Balance weight, 103 ... Wire rope, 104 ... Sheave, 105 ... Hoistway Floor, 106 ... Hoist.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takashi Abe 1070 Ma, Hitachinaka-shi, Ibaraki F-term in Mito Building System Division, Hitachi, Ltd. Building Systems Group F-term (reference) 3F303 BA01 CB41 DB00 DC35 3F304 BA26 DA61 EA11 ED05 ED13

Claims (1)

[Claims] An upper surface or a side surface of a shock absorber which is installed directly under a car at the bottom of a hoistway on which a car is raised or lowered, or directly below a counterweight, or indirectly via a bracket or the like. Or a structure for sensing and recording pressure generated in the shock absorber when the car or the counterweight collides with the shock absorber on the lower surface or on the side of the shock absorber. And elevator equipment.